Cassell, a registered Republican, quickly backpedaled in an interview with the Orlando Sentinel, but said he's perfectly happy to lose business over the sign. "I'm not turning anybody away, that would be unethical," he told the Sentinel. "But if they read the sign and turn the other way, so be it."

Patients who continue past the sign on Cassell's door find a waiting room stacked with Republican pamphlets opposing health care reform, underneath a sign reading, "This is what the morons in Washington have done to your health care. Take one, read it and vote out anyone who voted for it."

Rep. Alan Grayson (D-Fla.) told the Sentinel he was "disgusted" by Cassell's behavior.

"Maybe he thinks the Hippocratic Oath says, 'Do no good'," Grayson said. "If this is the face of the right wing in America, it's the face of cruelty. ... Why don't they change the name of the Republican Party to the Sore Loser Party?"